Frequencies of HIV gp120-specific B cells by memory subsets in HIV progressors, HIV VC, and HIV EC. (A) Frequencies of HIV gp120-specific B cells in each B cell subpopulation. (B) Comparison of frequencies of HIV gp120-specific B cells in each B cell subpopulation (AM, RM, TLM, and IM) in each group. Bars represent means ± SEM and groups compared by Mann-Whitney tests.